<template>
  <div ref="EchartsSvg" id="EchartsSvg"></div>
</template>

<script>
export default {
  data() {
    return {
      barEcharts: null,
    }
  },
  mounted() {
    this.$nextTick(() => {
      this.barechartsFun()
    })
    window.addEventListener('resize', () => {
      this.barEcharts.resize() // 窗口发生改变就更新echarts
    })
  },
  beforeDestroy() {
    this.barEcharts.dispose()
    window.removeEventListener('resize', this.barEcharts)
  },
  methods: {
    barechartsFun() {
      this.barEcharts = this.$echarts.init(this.$refs.EchartsSvg)

      function getParametricEquation(startRatio, endRatio, isSelected, isHovered, k, h) {
        // 计算
        let midRatio = (startRatio + endRatio) / 2

        let startRadian = startRatio * Math.PI * 2
        let endRadian = endRatio * Math.PI * 2
        let midRadian = midRatio * Math.PI * 2

        // 如果只有一个扇形，则不实现选中效果。
        // if (startRatio === 0 && endRatio === 1) {
        //     isSelected = false;
        // }
        isSelected = false
        // 通过扇形内径/外径的值，换算出辅助参数 k（默认值 1/3）
        k = typeof k !== 'undefined' ? k : 1 / 3

        // 计算选中效果分别在 x 轴、y 轴方向上的位移（未选中，则位移均为 0）
        let offsetX = isSelected ? Math.sin(midRadian) * 0.1 : 0
        let offsetY = isSelected ? Math.cos(midRadian) * 0.1 : 0

        // 计算高亮效果的放大比例（未高亮，则比例为 1）
        let hoverRate = isHovered ? 1.05 : 1

        // 返回曲面参数方程
        return {
          u: {
            min: -Math.PI,
            max: Math.PI * 3,
            step: Math.PI / 32,
          },

          v: {
            min: 0,
            max: Math.PI * 2,
            step: Math.PI / 20,
          },

          x: function (u, v) {
            if (u < startRadian) {
              return offsetX + Math.cos(startRadian) * (1 + Math.cos(v) * k) * hoverRate
            }
            if (u > endRadian) {
              return offsetX + Math.cos(endRadian) * (1 + Math.cos(v) * k) * hoverRate
            }
            return offsetX + Math.cos(u) * (1 + Math.cos(v) * k) * hoverRate
          },

          y: function (u, v) {
            if (u < startRadian) {
              return offsetY + Math.sin(startRadian) * (1 + Math.cos(v) * k) * hoverRate
            }
            if (u > endRadian) {
              return offsetY + Math.sin(endRadian) * (1 + Math.cos(v) * k) * hoverRate
            }
            return offsetY + Math.sin(u) * (1 + Math.cos(v) * k) * hoverRate
          },

          z: function (u, v) {
            if (u < -Math.PI * 0.5) {
              return Math.sin(u)
            }
            if (u > Math.PI * 2.5) {
              return Math.sin(u) * h * 0.1
            }
            return Math.sin(v) > 0 ? 1 * h * 0.1 : -1
          },
        }
      }

      // 生成模拟 3D 饼图的配置项
      function getPie3D(pieData, internalDiameterRatio) {
        let series = []
        let sumValue = 0
        let startValue = 0
        let endValue = 0
        let legendData = []
        let linesSeries = [] // line3D模拟label指示线
        let k = typeof internalDiameterRatio !== 'undefined' ? (1 - internalDiameterRatio) / (1 + internalDiameterRatio) : 1 / 3

        // 为每一个饼图数据，生成一个 series-surface 配置
        for (let i = 0; i < pieData.length; i++) {
          sumValue += pieData[i].value

          let seriesItem = {
            name: typeof pieData[i].name === 'undefined' ? `series${i}` : pieData[i].name,
            type: 'surface',
            parametric: true,
            wireframe: {
              show: false,
            },
            pieData: pieData[i],
            pieStatus: {
              selected: false,
              hovered: false,
              k: 1 / 10,
            },
          }

          if (typeof pieData[i].itemStyle != 'undefined') {
            let itemStyle = {}

            typeof pieData[i].itemStyle.color != 'undefined' ? (itemStyle.color = pieData[i].itemStyle.color) : null
            typeof pieData[i].itemStyle.opacity != 'undefined' ? (itemStyle.opacity = pieData[i].itemStyle.opacity) : null

            seriesItem.itemStyle = itemStyle
          }
          series.push(seriesItem)
        }

        // 使用上一次遍历时，计算出的数据和 sumValue，调用 getParametricEquation 函数，
        // 向每个 series-surface 传入不同的参数方程 series-surface.parametricEquation，也就是实现每一个扇形。
        for (let i = 0; i < series.length; i++) {
          endValue = startValue + series[i].pieData.value

          series[i].pieData.startRatio = startValue / sumValue
          series[i].pieData.endRatio = endValue / sumValue
          series[i].parametricEquation = getParametricEquation(series[i].pieData.startRatio, series[i].pieData.endRatio, false, false, k, series[i].pieData.value)

          startValue = endValue

          // 计算label指示线的起始和终点位置
          let midRadian = (series[i].pieData.endRatio + series[i].pieData.startRatio) * Math.PI
          let posX = Math.cos(midRadian) * (1 + Math.cos(Math.PI / 2))
          let posY = Math.sin(midRadian) * (1 + Math.cos(Math.PI / 2))
          let posZ = Math.log(Math.abs(series[i].pieData.value + 1)) * 0.1
          let flag = (midRadian >= 0 && midRadian <= Math.PI / 2) || (midRadian >= (3 * Math.PI) / 2 && midRadian <= Math.PI * 2) ? 1 : -1
          let color = pieData[i].itemStyle.color
          let turningPosArr = [posX * 1.8 + i * 0.1 * flag + (flag < 0 ? -0.5 : 0), posY * 1.8 + i * 0.1 * flag + (flag < 0 ? -0.5 : 0), posZ * 2]
          let endPosArr = [posX * 1.9 + i * 0.1 * flag + (flag < 0 ? -0.5 : 0), posY * 1.9 + i * 0.1 * flag + (flag < 0 ? -0.5 : 0), posZ * 6]
          linesSeries.push(
            {
              type: 'line3D',
              lineStyle: {
                color: color,
              },
              data: [[posX, posY, posZ], turningPosArr, endPosArr],
            },
            {
              type: 'scatter3D',
              label: {
                show: true,
                distance: 0,
                position: 'center',
                textStyle: {
                  color: 'black',
                  backgroundColor: color,
                  borderWidth: 2,
                  fontSize: 16,
                  padding: 10,
                  borderRadius: 4,
                },
                formatter: '{b}',
              },
              symbolSize: 0,
              data: [
                {
                  name: series[i].name + '\n' + series[i].pieData.value,
                  value: endPosArr,
                },
              ],
            }
          )

          legendData.push(series[i].name)
        }
        series = series.concat(linesSeries)

        // // 补充一个透明的圆环，用于支撑高亮功能的近似实现。
        series.push({
          name: 'mouseoutSeries',
          type: 'surface',
          parametric: true,
          wireframe: {
            show: false,
          },
          itemStyle: {
            opacity: 0.1,
            color: '#E1E8EC',
          },
          parametricEquation: {
            u: {
              min: 0,
              max: Math.PI * 2,
              step: Math.PI / 20,
            },
            v: {
              min: 0,
              max: Math.PI,
              step: Math.PI / 20,
            },
            x: function (u, v) {
              return ((Math.sin(v) * Math.sin(u) + Math.sin(u)) / Math.PI) * 2
            },
            y: function (u, v) {
              return ((Math.sin(v) * Math.cos(u) + Math.cos(u)) / Math.PI) * 2
            },
            z: function (u, v) {
              return Math.cos(v) > 0 ? -0.5 : -5
            },
          },
        })

        // // 补充一个透明的圆环，用于支撑高亮功能的近似实现。
        series.push({
          name: 'mouseoutSeries',
          type: 'surface',
          parametric: true,
          wireframe: {
            show: false,
          },
          itemStyle: {
            opacity: 0.1,
            color: '#E1E8EC',
          },
          parametricEquation: {
            u: {
              min: 0,
              max: Math.PI * 2,
              step: Math.PI / 20,
            },
            v: {
              min: 0,
              max: Math.PI,
              step: Math.PI / 20,
            },
            x: function (u, v) {
              return ((Math.sin(v) * Math.sin(u) + Math.sin(u)) / Math.PI) * 2
            },
            y: function (u, v) {
              return ((Math.sin(v) * Math.cos(u) + Math.cos(u)) / Math.PI) * 2
            },
            z: function (u, v) {
              return Math.cos(v) > 0 ? -5 : -7
            },
          },
        })
        series.push({
          name: 'mouseoutSeries',
          type: 'surface',

          parametric: true,
          wireframe: {
            show: false,
          },
          itemStyle: {
            opacity: 0.1,
            color: '#E1E8EC',
          },
          parametricEquation: {
            u: {
              min: 0,
              max: Math.PI * 2,
              step: Math.PI / 20,
            },
            v: {
              min: 0,
              max: Math.PI,
              step: Math.PI / 20,
            },
            x: function (u, v) {
              return ((Math.sin(v) * Math.sin(u) + Math.sin(u)) / Math.PI) * 2.2
            },
            y: function (u, v) {
              return ((Math.sin(v) * Math.cos(u) + Math.cos(u)) / Math.PI) * 2.2
            },
            z: function (u, v) {
              return Math.cos(v) > 0 ? -7 : -7
            },
          },
        })

        // 准备待返回的配置项，把准备好的 legendData、series 传入。
        let option = {
          //animation: false,

          legend: {
            left: '70%',
            //top: 'center',
            textStyle: {
              fontSize: 18,
              color: '#fff',
            },
            // icon:'diamond',
            data: legendData,
            formatter: (params) => {
              return params
            },
          },
          tooltip: {
            formatter: (params) => {
              if (params.seriesName !== 'mouseoutSeries') {
                return `${params.seriesName}<br/><span style="display:inline-block;margin-right:5px;border-radius:10px;width:10px;height:10px;background-color:${params.color};"></span>${
                  option.series[params.seriesIndex].pieData.value
                }`
              }
            },
          },
          xAxis3D: {},
          yAxis3D: {},
          zAxis3D: {},
          grid3D: {
            viewControl: {
              //3d效果可以放大、旋转等，请自己去查看官方配置
              autoRotateDirection: 'ccw',
              distant: 1000,
              // alpha: 40,
              // beta: 40,
              rotateSensitivity: 1,
              zoomSensitivity: 1,
              panSensitivity: 0,
              autoRotate: true,
            },
            left: 'center',
            width: '100%',
            show: false,
            // boxHeight: 50,
            // boxDepth: 50
          },
          series: series,
        }
        return option
      }

      // 传入数据生成 option
      let option = getPie3D([
        {
          name: '全量数据区',
          value: 357,
          itemStyle: {
            color: '#51d7e5',
          },
        },
        {
          name: '核心数据区',
          value: 193,
          itemStyle: {
            color: '#f8ad1d',
          },
        },
        {
          name: '主题数据区',
          value: 23,
          itemStyle: {
            color: '#dd1f48',
          },
        },
      ])
      console.log(option)
      // debugger
      this.barEcharts.setOption(option)
      this.myecharts.resize()
    },
  },
}
</script>

<style lang="scss" scoped>
#EchartsSvg {
  width: 100%;
  height: 100%;
}
</style>
<!--<template>-->
<!--  <div ref="EchartsSvg" id="EchartsSvg"></div>-->
<!--</template>-->

<!--<script>-->
<!--export default {-->
<!--  data() {-->
<!--    return {-->
<!--      barEcharts:null,-->
<!--    }-->
<!--  },-->
<!--  mounted() {-->
<!--    this.barechartsFun()-->
<!--  },-->
<!--  methods: {-->
<!--    barechartsFun() {-->
<!--      this.barEcharts=this.$echarts.init(this.$refs.EchartsSvg)-->
<!--        let option = {-->
<!--          xAxis: {-->
<!--            type: 'category',-->
<!--            data: ['Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun']-->
<!--          },-->
<!--          yAxis: {-->
<!--            type: 'value'-->
<!--          },-->
<!--          series: [-->
<!--            {-->
<!--              data: [150, 230, 224, 218, 135, 147, 260],-->
<!--              type: 'line'-->
<!--            }-->
<!--          ]-->
<!--        };-->
<!--      this.barEcharts.setOption(option)-->
<!--    }-->
<!--  }-->

<!--}-->
<!--</script>-->

<!--<style lang="scss" scoped>-->
<!--#EchartsSvg {-->
<!--  width: 100%;-->
<!--  height: 100%;-->
<!--}-->
<!--</style>-->
